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Nonlinear compensation
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In this study, a control system is proposed for the induction servomotor to achieve the highprecision speed tracking based on wavelet fuzzy cerebellar model articulation controller. In this proposed scheme, the wavelet fuzzy cerebellar model articulation controller (WFCMAC) is used to imitate an ideal controller due to it incorporates the advantages of the wavelet decomposition property with a fuzzy CMAC fast learning ability and the smooth compensator controller with bound estimation is designed to attenuate the effect of the approximation error caused by the WFCMAC approximator.
13p
vimarillynhewson
02-01-2024
3
3
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In this paper, a modified feedback error learning approach (called MFEL) is proposed for a nonlinear system. In MFEL, an inverse evolutionary neural (IEN) model that dynamically identifies offline all nonlinear features of the nonlinear system, provides the initial value of a feedforward compensator.
8p
vijeff
01-12-2023
5
3
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In this paper, a point-to-point positioning controller based on Active Disturbance Rejection Control (ADRC) is applied to a linear motion actuator using lead ball screw. In the design, the Extended State Observer (ESO) is adopted to the controller structure, and the ADRC is designed which consists of the ESO and the nonlinear PD controller to estimate and compensate the disturbances.
7p
viannee
02-08-2023
5
4
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This paper proposes a new method to compensate backlash by using Model Reference Adaptive Control (MRAC) and a nonlinear compensator without pre-determined backlash parameters. The adaptive controller assures the controllability of the different systems with uncertain parameters. While, the nonlinear compensator is used to overcome the effect of backlash.
8p
vidoctorstrange
06-05-2023
5
1
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This paper presents a nonlinear controller with dynamic compensation for six degrees of freedom (6-DOF) manipulator Denso VS-6556 in practice. The manipulator is a complex nonlinear system with some limitations when applying a linear controller to control it.
9p
vicaptainmarvel
21-04-2023
8
4
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This paper proposes a Takagi-Sugeno (TS) fuzzy approach for 2-dimensional of freedom overhead crane. Since this system is underactuated with nonlinear mathematical dynamic model, the requirement of achieving accurate positioning while eliminating oscillation is a challenging issue.
8p
viporsche
25-10-2022
3
2
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A case study is presented when the car is parked at a landing level where the fundamental natural frequencies of the car, suspension and compensating rope system coincide with one of the natural frequencies of the high-rise building. The results show a range of nonlinear dynamic interactions between the components of the elevator system that play a significant role in the operation of the entire installation.
22p
guernsey
28-12-2021
11
0
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In this paper, we investigate the nonlinear and dispersion compensation efficiency in OFDM-WDM system using an advanced optical back propagation (OBP) approach based on split-step Fourier method.
7p
viaespa2711
31-07-2021
28
5
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This paper studies the effects of nonlinear distortion of Low Noise Amplifier (LNA) in the multichannel direct-RF sampling receiver (DRF). The main focus of our work is to study and compare the effectiveness of the different adaptive compensation algorithms, including the inverse-based and subtract-based Least Mean Square (LMS) algorithm with a fixed and variable step size. The models for the compensation circuits have been analytically derived. As the major improvements, the effectiveness of the compensation circuits under the ADC quantization noise effect is evaluated.
12p
trinhthamhodang9
10-12-2020
13
1
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In this paper, we investigate the impact of frequency shift on the nonlinear compensation using OPC for high symbol rate, high level modulation format signals. This will be important to understand the tolerance of the OPC techniques against such a practical condition for actual system implementations.
8p
trinhthamhodang9
10-12-2020
14
0
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In this study, we propose an optical back propagation (OBP) approach for compensation of the nonlinear and dispersion distortions in direct-detection optical OFDM system. The proposed OBP using split-step Fourier method is implemented at transmitter that is suitable for high-rate OFDM-based LR-PONs applications.
10p
tamynhan6
14-09-2020
12
1
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Study counter measures to limit the adverse impacts of nonlinear distortions in MIMO-STBC systems using predistortion at the transmitter; propose phase estimation and compensation schemes that overcome the adverse impacts of nonlinear distortions at the receiver.
158p
gaocaolon6
30-07-2020
24
2
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This article highlights a robust adaptive tracking control approach for a nonholonomic wheeled mobile robot by which the bad problems of both unknown slippage and uncertainties are dealt with. The radial basis function neural network in this proposed controller assists unknown smooth nonlinear dynamic functions to be approximated. Furthermore, a technical solution is also carried out to avoid actuator saturation. The validity and efficiency of this novel controller, finally, are illustrated via comparative simulation results.
18p
nguyenanhtuan_qb
18-06-2020
27
2
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In this paper, some non-linear control algorithms have been verified through simulation and installed in atmega 32 microcontroller for 2D overhead crane system in the laboratory. The contribution of the paper is to evaluate the applicability of these laws and to create a practical research toolkit for students in the major of Automatic Control. The software of the proposed digital controllers has open structure to increase the ability of installing the new algorithms and the human-friendly interface on personal computer.
9p
thithizone1
18-07-2019
19
0
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The inner loop, a feedback control loop, is designed as a proportional – integral – derivative (PID) controller in order to eliminate unknown parts of the plants such as input-nonlinear elements, or unknown system disturbances. The outer loop, a learning feed-forward control (LFFC) loop, is designed based on the Model Reference Adaptive System algorithms called MRAS-based LFFC for compensating the cross-couple and non-linear elements.
9p
thithizone
16-07-2019
13
1
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This paper investigates the design of decentralized controllers for a class of large scale switched nonlinear systems under arbitrary switching laws. A global large scale switched system can be split into a set of smaller interconnected switched Takagi-Sugeno fuzzy subsystems. In this context, to stabilize the overall closedloop system, a set of switched non-ParallelDistributed-Compensation (non-PDC) outputfeedback controllers is considered.
12p
vioishi2711
01-07-2019
34
0
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The friction and ripple effects from motor and drive cause a major problem for the robot position accuracy, especially for robots with high gear ratio and for high-speed applications. In this paper we introduce a simple, effective, and practical method to compensate for joint friction of flexible joint robots with joint torque sensing, which is based on a nonlinear disturbance observer.
19p
shiwo_ding7
05-06-2019
31
3
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A linear-like discrete-time fuzzy controller was designed to control and stabilize a single-pool irrigation canal. Saint Venant equations for open-channel flow were linearized using the Taylor series and a finite-difference approximation of the original nonlinear partial differential equations.
14p
masterbarista
15-01-2019
23
1
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This paper presents multi-period linearized optimal power flow (MPLOPF) with the consideration of transmission network losses and Thyristor Controlled Series Compensators. The transmission losses are represented using piecewise linear approximation based on line flows. In addition, the nonlinearity due to the impedance variation of transmission line with TCSC is linearized deploying the big-M based complementary constraints.
6p
vidanh95
12-12-2018
29
1
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Servo compensation usually implies that some type of filter network such as lead/lag circuits or proportional, integral, or differential (PID) algorithms will be used to stabilize the servo drive. However, there are other types of compensation that can be used external to the servo drive to compensate for other things in the servo plant (machine) that can, for example, be structural resonances or nonlinearities such as lost motion or stiction. These machine compensation techniques are shown in Figure 1 and are valid for either hydraulic or electric servo drives. 11.
24p
thanhspktcdt10
23-03-2013
52
5
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